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02-09-2022, 03:45 PM | #21 |
Senior Member
Join Date: May 2010
Location: Larry Young, Tulsa, OK
Posts: 202
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Re: Fuel Gage - volatge senstive?
I am starting on gauges for our '40 pickup. I've read a lot of posts on this subject, so I think I understand most of the issues. I will have to use an aftermarket gauge, since the original will not fit into the new tank. I've gotten a couple of sending units recommended here (Carpenter and Yogi's). I've also gotten some of the MC7806 voltage regulators ($0.39 each). I've got 4 different gauge clusters, but most sat out in the weather and look nasty. I need a good working gauge to figure out how to adjust the sending unit arm length and height. How can I test these gauges to find one that works? Can I briefly touch 6v across the contacts to see if the needle moves? When they don't work what is normally the problem and how do you fix it?
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02-09-2022, 08:42 PM | #22 |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
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Re: Fuel Gage - volatge senstive?
Use a 1.5 volt battery and you should get a half scale reading
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02-13-2022, 08:05 PM | #23 |
Senior Member
Join Date: May 2010
Location: Larry Young, Tulsa, OK
Posts: 202
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Re: Fuel Gage - volatge senstive?
I played with several gauges today. With the face off, the oil pressure and fuel gauge appear to be identical. The temperature gauge appears to be a mirror image. All measure about 10.5 ohms through the windings, however, the needle doesn't move with 1.5 volts. So I still don't know whether I've got any good gauges, but the consistent 10.5 ohm measurement suggest they should work. Any ideas?
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